Exterior portions of guard assemblies for parcel door locking systems of cluster box unit mail delivery receptacles



FIG. 1 is a perspective view for exterior portions of guard assemblies for parcel door locking systems of cluster box unit mail delivery receptacles showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof.

The broken-line disclosure found in certain of the drawing views is provided for illustrative purposes only and forms no part of the claimed design. 

We claim the ornamental design for exterior portions of guard assemblies for parcel door locking systems of cluster box unit mail delivery receptacles, as shown and described. 